Roll mounting



Jan. 1, 1929.

J. u. FORBES ROLL MOUNTING Filed March 192! Patented Jan. 1,1929.

JERRY U. FORBES, F CINCINNATI,

ROLL MOUNTING.

Application flled ltarch 3, 1927. Serial No. 172,470.

My invention relates to paper making machinery, and more specially to the rolls for facilitate the lubrication of'their bearings and otherwise to render-more convenient the care and operation of this part of a papermaking machine. Other objects will appear inthe course of the following description.

I attain these objects by the device illustrated, for example, in the accompanying drawing, in which- Figure 1 is a plan view of the device;

Fig. 2 is a side elevation of the same;

Fig. 3 is a partial vertical longitudinal section, enlarged, on the plane of the line 33 of Fig. 1;

Fig. 4 is an end elevation of one of the rolls and its bearing, corresponding to 1g. 3; and

Fig. 5 is a vertical cross section on the plane of the line 55 of Fig. 3. 1

The two rolls 1 are, as usual, made of wood, and each roll has its ends reduced at 2 and 3 to receive respective ferrules 4 and 5, .wh1ch are forced onto these reduced portions 2 and 3, u against the shoulders formed thereby; the iameter of the ferrules being the same as that of the main parts of the rolls,'so that the exterior surfaces are practically continuous.

I support these rolls by means of bearing studs 6 and 7 entering the ferrules 4 and 5; these studs being rigidly supported in pedestals 8 and 9, respectively, which pedestals are fixed to the bed 10. The edestal 9 supports the studs 7 of both rol s at the middle, with the studs 7- extending out in opposite directions at the proper angle; the converging relation of the rolls being well known in the art, as also is the purpose of this arrangement of rolls, so that these matters need not be further referred to. Heretofore, however, so far as I am aware, the practice has been to place metal indles in the ends of the wooden rolls, an allow these spindles to turn in bearings fixed onthe bed of the spread roll mechanism. Such spindles work loose in the ends of the rolls, not only requiring frequent expensive repair work, but endangering the felt web guided by the rolls when these spindles allow the rolls to run out of proper position, upon loosening of the spindles as just mentioned. By making these rolls turn on stationary studs 6 and 7, the repair work, if needed, is simplified; and I thus provide better bearings and support these earings in a more reliable manner, so that the need of repairs is greatly reduced.

The bearing construction shown in detail in Figs. 3, 4 and 5 is that of the outer bear ings, with the stud 6; but it will-be understood that the inner bearings are similar, except that the studs 7 are shorter, where they are mounted in the common middle pedestal 9 as above described. The outer ferrules 4 and inner details, and inner ferrules 5 and inner details, are all alike, so that these parts may be made under quantity production methods, allowing economy in the manufacture of the mechanisms, although the length of the rolls, for webs of different widths, may vary in different installations.

The reduced end 2 of the roll 1, with shoulder 11, has the ferrule 4 fitted tightly thereon up against the shoulder 11, and this ferrule has its "diameter the same as that of the main part of the roll, so that the surfaces of the ferrule and roll are continuous and smooth, as is required for the proper running of the felt thereupon. The outer end of the ferrule 4 is bored at 12 but not continuously with the bore that receives the roll end 2, leaving a partition 13 (Fig. 3) against which the roller bearing assemblage 14 is clamped by means of a threaded bushing 15 which is screwed into the enlarged outer end 16 of the bore, with a collar 17 and packing ring 18 interposed between the bushing 15 and the roller bearing assemblage 14; all of these parts embracing the stud 6, which has interposed between its inner end and the partition 13 the end-thrust ball bearing 19. The collar 17 has its outer side recessed around next to the stud 6, toireceive the packing ring 18; and the bushing15 has a neck 20 i its sides in which the rollers 24 have slight central end projections, merely to keep the rolllie latter free to bear fully, outward against the shell 22 and inwardly against the stud 6.

, Thepacking ring 18 confines lubricant in this roller bearing assemblage and in the endthrust bearing 19. To supply lubricant to these parts, the stud 6 has a bore 26 centrally throughout its length, and lateral bores 27 leading from the central bore 26 outto the rollers 24; the inner end of the central bore 26 leading to the end-thrust bearing 19, and

the exterior end being tapped to'receive the nozzle of a suitable grease gun or the like for forcing the lubricant into the bearings. This outer end is closed by a screw plug 28. The

stud 6 has its outer end inserted in the trans versebore of the pedestal 8, and is clamped therein b the set screw 29 passing down through t e top of the pedestal. At the mid dle pedestal 9, similar set screws 30 hold the studs 7; and the lubrication is'provided for here by a passage 31 leading from the outside of the pedestal 9 to the inside of its bores, to communicate with the central bores of the studs 7. This passage 31 is closed by the plug 32. v

The bed 10, as I prefer to construct it, for

durability and for forming an adequately rigid support for the pedestals 8 and 9 to keep the roller bearings properly alined, comprises the two longitudinal sills 33, which are angle bars with their horizontal members inward and vertical members downward; these sills being joined at their ends by top strut plates 34, to which the outer pedestals 8 are fixed by bolts 35, and being joined at their middles by the top strut plate 36, to which'the middle pedestal 9 is xed by the bolts 37. -Thus a rectangular frame or bed is made up; taking the place of the plank or timber usually employed to supportspread rolls, and which warps, swells and cracks, allowing the roll hearings to loosen or pulling them out of alinement. By providing accurate roller bearings, together with an adequate support for these hearings, to keep them in their necessary alinement, I avoid most of the difficulty heretofore encountered in the upkeep and management of spread rolls. Further to guard against distortion of the mechanism. I provide a truss rod 38 longitudinally of the bed 10, with its ends passed through angle bars 39 fixed to the lower sides of the horizontal members of the sills 33 near their ends: the ends of the truss rod 38 having nuts 40 thereon to be screwed against the outer sides of these bars 39. At the middle. this truss rod 38 passes under angle bars l1 fixed on the bottoms of transverse timbers 42 which are'fixed up in the sills 33 short distances from the middle plate 36. Preferably, the end bars 39 are spaced inward far enough from the end strut plates 34 to allow a wrench to be inserted down past these plates 34; to the nuts 40, to tighten the truss rod 38.

For convenientlv retardin or sto) in end pivoted to the short arm of a lever 45 fulcrumed at l6 on the looped first mentioned end of the 'band and havingits longer arm serving as a handle 47 which the operator may raise to apply the brake by contracting the band 43 onto the bushing 15. Normally, the weight of this handle arm -17 keeps the band expanded away from the bushing, for free running of the roll. The bushings 15 are so threaded into the respective ferrules that application of the brakes tends to screw the bushings inwardly of the ferrules, tightening the closure of'the bearings; being threaded left hand for one roll and right hand for the other roll.

To prevent the felt web from being caught on the middle pedestal 9, I prefer to provide a tender 48, which is a piece of sheet metal with its lower end fixed to the adjacent outer side of the bed 10 and curving inwardly and downwardly over the pedestal 9 and the adjacent ends of the bushings 15; being tapered to fit in the space between the roll ends and being confined radially inward from the roll peripheries throughout its extent over the pedestal 9.

Modifications may occur in practice. and I do not wish to be understood as being limited to the precise disclosure herein. but having thus fully set forth a preferred example of my invention, what I claim as new and desire to secure by Letters Patent is:

1. In combination with a roll having a recess in its end, a stud and a support for said stud, a roller bearing in said recess around said stud, and a bushing secured insaid recess around said stud, holding said bearing in said recess.

2. In combination with a roll having a recess in its end, a stud and a support for said stud, a roller bearing in said recess around said stud, a bushing secured in said recess around said stud, holding said bearing in said recess and having a. projection outside said recess, and a brake mounted on saidsupport and acting against said projection of said bushing.

3. In combination with a roll having a reduced end part, a ferrule fitted on said end part, having an axial recess opening out through its outer end and a partition between said recess and the end of the roll. a stud and a support for said stud. a roller bearing in said recess around said stud, means to'hold mamao said, roller bearing in said recess, and an axial-thrust bearing between the inner end of said stud and said partition.

4. In combination .with a roll having a recess in itsend, a stud and a support for said stud, a bearing in said recess, embracing said stud, a collar around said stud with one side against said bearing and having its other side annularly recessed. around next to said stud, a packing washer in said recess of said collar, closely hugging said stud,and abushing secured in said recess of said roll structure, around said stud, with an annular projection entering said recess of said collar, against said packing washer.

5. In combination with rolls having bearings in their ends, a pedestalhaving opposite projections, said bearings embracing the respective projections, and a fender fixed on said supgrt and curving over said pedestal, and co ed radiall inward from the peripheries of said to structures throughout its extent over said pedestal.

6. In combination'with rolls having bearings in their ends, a pedestal, studs projecting in opposite directions from said pedestal, said bearingsembracing the respective studs, said pedestal having a passage inward from one side with branches to the ends of the respective studs therein, and said studs having passages from said ends to the respective bearings.

JERRY U. FORBES. 

